APPARATUS FOR ANALYZING AND SELECTING OPTIMUM AVIATION DECAMETRIC RADIO CHANNELS USING LINEAR FM SIGNALS Russian patent published in 2019 - IPC H04B7/00 

FIELD: aviation.

SUBSTANCE: invention relates to aeronautical radio communication engineering and is intended for determination of decameter radio channels with frequency-modulated (LFM) signals optimum in frequency and direction, and can be used to provide highly reliable DFM radio communication. For this purpose, the device comprises a computer designed to select the best operating frequencies and directions by processing data streams containing difference quadrature signals received from four uncorrelated ground-based probing transmitters, wherein receiving device is four-channel receiving device, including control and accurate time device, receiving antenna, low-pass filter, a controlled high frequency amplifier, an analogue-to-digital converter and a four-channel receiving processor, and the data on the optimum DCM radio channel is transmitted to the aircraft communication system on-board complex for further communication in certain channels.

EFFECT: technical result consists in automatic determination of best, optimum in frequency and direction of DFM radio channel in direction of aircraft (AC) - ground by using results obtained by processing data of inclined LFM probing in four directions using an algorithm which analyzes propagation conditions of radio waves, interference environment and optimum operating frequencies selected randomly, without preliminary setting of the table of tested frequencies.

5 cl, 1 dwg